How can I hide image (tree for example) in progressbar theme of beamer

Question

How can I hide the image (tree for example) in progressbar theme of beamer? I would like to change the color of title of section too.

Is it possible?

MWE

\documentclass[compress, 14pt]{beamer}

\usetheme{progressbar}
\progressbaroptions{headline=normal}

\begin{document}

\section{First}
\begin{frame}{Title}
Content
\end{frame}

\section{Second}*\color{yellow} here for example
\begin{frame}{\color{yellow}Teste 1}
Content
\end{frame}
\end{document}

Answer 1

The progress bar itself is defined in the outer theme, so you could use just use \useoutertheme{progressbar} in combination with any other general theme. Similarly, you could select any color theme with \usecolortheme, or define specific colors using \setbeamercolor. For example:

\documentclass[compress, 14pt]{beamer}
\usetheme{Dresden}
\useoutertheme{progressbar}

\setbeamercolor{frametitle}{fg=yellow}

\begin{document}

\section{First}
\begin{frame}{Title}
Content
\end{frame}

\section{Second}
\begin{frame}{Test 1}
Content
\end{frame}
\end{document}